Glue-applying machine.



No. 635,844. Patented Oct. 3|, I899; u. 1;. CHARLES.

GLUE APPLYING MACHINE.

(Application filed May 8, 1899.\

'No Model.)

W/TNESSES INVENTO/f A TTOHNE).

NiTEn STATES ULYSSES G. CHARLES, OF OSHKOSH, IVISOONSIN.

GLUE-APPLYING MACHINE.

SPECIFICATION forming part of Letters Patent No. 635,844, dated October 31, 1899. Application filed May 3, 1899. Serial No. 715,401. iNo model.)

To all whom it may concern:

Be it known that I, ULYssEs G. CHARLES, of Oshkosh, in the county of Winnebago and State of l/Visconsin, have invented a new and useful Improvement in Glue-Applying Machines, of which the following is a description, reference being had to the accompanying drawings, which are a part of this speci fication.

My invention relates to an improved machine for applying liquid glue to veneer, boards, cardboard, or other material in sheets or plates.

The invention consists of the machine, its parts, and combinations of parts, as herein described and claimed, or their equivalents.

In the drawings, Figure 1 is an end elevation of my improved. machine, parts being broken away and other parts shown in section for convenience ofillustratiom- Fig. 2 is a side elevation of the upper operative parts of the machine, parts being broken away and other parts being shown in section for convenience of illustration. Fig. 3 is a top plan view of the machine, some parts bein g broken away and omitted for convenience of illustration. Fig.4 is an end view of the upper portion of the machine, the glue-applying roll and the standards in which it is supported being tilted over to illustrate a feature of the invention. Fig. 5 is an end view of the glue-applyin g roll, a part being broken away, showing interior construction in section. Figs. 6 and 7 are respectively an elevation and a top plan view of a plug or key employed for securing the corners of the rollcovering screen in recesses therefor in the rim of the roll. Fig. 8 illustrates the construction of the glue-applying roll, parts being broken awayand parts being shown in section for convenience of illustration and to exhibit interior construction. ment of the roll-covering screen in the form itis made for being applied to the roll.

In the drawings, 10 is the frame, made in suitable form and size for supporting the operative parts of the mechanism. In the top of the main frame there is a shallow glueholding tank 1], which is set in a receptacle 12, between which receptacle and tank a steam-chamber 13 is formed, the chamber being adapted to hold a supply of steam and Fig. 9 is a fragthe condensed water therefrom for keeping the glue hot in the tank 11 and preserving its liquid condition. The steam-chamber 13 is provided with steam through the supply-pipe 14, which leads into the chamber 13, and is provided with numerous apertures for discharging the steam into the chamber. A discharge-pipe 15, leading from the chamber 13, near its top, is adapted to discharge the water of condensation from the chamber.

For taking up the glue from the tank 11 and applying it to a sheet or board a glueapplying roll 16 is provided, which roll is provided with a shaft 17, mounted in the legs of an ancillary frame 18, the feet of which legs rest on the top side edges of the tank 11 and are hinged thereto at one side, whereby the ancillary frame'is adapted to be tilted over, as shown in Fig. 4, raising the roll 16 out of the glue-tank and carrying it substantially away from over the tank.

Just above the roll 16 and one at'each side of the vertical plane of the axis of the roll 16 are two bearing-rolls 19 19, parallel with the roll 16 and opposite thereto and mounted in head-blocks 2O 20, movable vertically in the legs of the frame 18. Screws 21 21, mounted revolubly in the legs of the frame 18, turn by their threads through the head-blocks 20 20 and are adapted for raising and lowering those blocks, thereby adjusting the rolls 19 nearer to or farther from the roll 16, as required'for using the machine for applying glue either to thin or thick material. A transverse shaft 22, mounted in the top cross-piece of the ancillary frame 18 and geared to the screws 21, is adapted, by means of a crank to be applied thereto, for raising and lowering the rolls 19 by rotation of the screws 21.

For rotating the roll 16 its shaft is provided with a gear-wheel 23, that meshes with a pinion 24 on an arbor 25, mounted on the frame, and provided with a belt-pulley 26.

To adapt the roll 16 for taking up a suitable supply of liquid glue from the tank 11, in which supply of glue the roll 16 is arranged to rotate, and for properly applying glue to the material, I provide a depression in the roll, entirely about the roll from near one end to near the other end, which depression is filled with a liquid-absorbing material 27, as felt, asbestos, or some coarse fabric, and over this glue-absorbing material and forming a covering for the entire perimeter of the roll is placed a wire-screen cover 28. This construction of the roll adapts it for holding a sufficient supply of the liquid glue and for applying it abundantly to the material without any danger of pulling the glue from the material as the roll rotates and separates from the article being supplied with the glue.

As a convenient and satisfactory means for securing the wire-screen cover 28 to the perimeter of the roll I cut a diagonal slit 29 in each of the four corners of the screen as cut and prepared to be fitted on the roll and then turn the thus-prepared clips on the screen along a line indicated by the dotted lines 30 30 down into a recess 31 therefor in the chimes of the drum. This recess 31 is preferably beveled inwardly from the outer surface on its lateral walls, which are also so inclined as to make the recess dovetailed in cross-section. I provide plugs or keys 32, Figs. 6 and 7, that fit into these recesses against the downwardly-turned clips of the screen and hold the screen-cover in place on the roll. The keys are held in place detachably by screws 33, revoluble through bridges 34: and turning into the inner ends of the keys. The feet of the bridges 34 rest against the inner surfaces of the chimes of the roll, the roll being preferably of a drum-like construction.

From the foregoing description it will be understood that the material, as a board A, can be coveredwith liquid glue on its under surface by running it through the machine, being held to the surface of the rotating rolls 16 by the rolls 19, and also that the passing of material through the machine, and thus coating it with liquid glue, can be continued indefinitely; also,that the rolls 19 can be readily-raised or loweredto adapt the machine for passing material of different thicknesses through it and holding the material to the surface of the glue-applying roll 16.

For some kinds of work, especially for coarse and heavy work, and particularly if the glue to be applied is a stiff or thick composition, a roll may be used in which the absorbing material 27 is omitted, and a screen is secured directly to the non-depressed surface of the roll. Such a screen, whether constructed of reticulated material or of a perforated sheet of metal, will serve the purpose of taking up and applying the glue under the conditions stated and in such case would be the equivalent of the preferable form of construction hereinbefore described; also, if a large glue-applying roll is required for any specific work it may be desirable to secure the screen-cover to the roll otherwise than at the corners of the sheet, as hereinbefore described, and in such case clips may be formed by cutting the screen at different points in its margin, and these clips may be turned down into recesses formed in the chimes therefor,'substantially like those shown in the drawings, and the clips may be secured therein by keys like those .hereinbefore described.

What I claim as my invention is 1. A roll provided with recesses in its chimes extending inwardly from its exterior surface, a screen-cover about the roll, clips formed of the cover turned into said recesses, and plugkeys inserted in the recesses against the clips therein, and means for securing the keys in position detachably.

2. In a glue-applying machine, the combination with a frame and a tank thereon for holding liquid glue,of a glue-applying roll consisting of a cylinder provided with an annular depression in its perimeter medially extending nearly from end to end thereof, a felt or analogous liquid-absorbing material secured to and filling the annular depression in the cylinder, and a wire-screen cover over the felt-absorbing material secured to and closely covering the perimeter of the cylinder.

In testimony whereof I affix my signature in presence of two witnesses.

ULYSSES G. CHARLES. Witnesses:

GEORGE HILTON, F. BURGESS. 

